Results - Annual Differences

Description

This page contains results for how the probability of homing varies by year, and also shows the estimates for the random effect of year for this specific movement. As a reminder of how year effects were strcutured, a random effect for each year was included only for state transitions into or out of states within the DPS boundaries, and random effects for year were all origin specific (no DPS-wide year effects).

Annual movement probability estimation steps

For each dataset (combination of DPS and rear type), the following steps were run:

1. Extract the median covariate values experienced by all fish in the dataset in a specific year (for spill volume, winter spill days, and temperature). These median values are used to estimate the probability of movement. NOTE: Because median values across the full dataset are used, populations with strong temperature responses (for overshoot and movement into other tributaries) will have low movement probabilities to home tributaries.
2. Evaluate the probability of movement in each year based on the random effect of year plus the median covariate values in that year.

If a tributary has both a hatchery and natural origin population, they are shown on the same plot.

Notes

• The Salmon, Grande Ronde, and Clearwater River do not have detection efficiency corrections (no suitable arrays). As a result, the random effect of year shows much clearer patterns for these tributaries compared to the others, with the random effect of year explaining much of the year-to-year difference in detection efficiency (note the clear upward trend in the random effect of year for these populations as more arrays were installed over time).

Middle Columbia

Homing movement probability for Deschutes River Steelhead.

Random effect of year for mainstem -> Deschutes

Homing movement probability for John Day River Steelhead.

Random effect of year for mainstem -> John Day

Homing movement probability for Fifteenmile Creek Steelhead.

Random effect of year for mainstem -> Fifteenmile Creek

Homing movement probability for Umatilla River Steelhead.

Random effect of year for mainstem -> Umatilla

Homing movement probability for Yakima River Steelhead.

Random effect of year for mainstem -> Yakima

Homing movement probability for Walla Walla River Steelhead.

Random effect of year for mainstem -> Walla Walla

Upper Columbia

Homing movement probability for Wenatchee River Steelhead.

Random effect of year for mainstem -> Wenatchee

Homing movement probability for Entiat River Steelhead.

Random effect of year for mainstem -> Entiat

Homing movement probability for Okanogan River Steelhead.

Random effect of year for mainstem -> Okanogan

Homing movement probability for Methow River Steelhead.

Random effect of year for mainstem -> Methow

Snake River

Homing movement probability for Asotin Creek Steelhead.

Random effect of year for mainstem -> Asotin Creek

Homing movement probability for Clearwater River Steelhead.

Random effect of year for mainstem -> Clearwater

Homing movement probability for Imnaha River Steelhead.

Random effect of year for mainstem -> Imnaha

Homing movement probability for Grande Ronde River Steelhead.

Random effect of year for mainstem -> Grande Ronde

Homing movement probability for Salmon River Steelhead.

Random effect of year for mainstem -> Salmon

Homing movement probability for Tucannon River Steelhead.

Random effect of year for mainstem -> Tucannon